Disk furrow-opener.



C. W. DICKINSON. DISK Fuhnow OPENER.

APPLICATION FILED FEB. 19. 1909.

Patented Feb. 8,1916.

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THE cuLUMmA PLANomzAPH ccn, WASHINGTON, n. c.

C. W. DICKINSON.

DISK FURROW OPENER.

APPLICATION FiLED FEB. 19, 1909.

' Patented Feb. 8, 1916.

2 SHEETSSH EET 2.

CLINTON w. DICKINSON, or LA CROSSE, Wisconsin.

' DISK FUBROW-OPENEB.

Specification of Letters Patent. Patented Feb. 1916.

Application filed. February 19, 1909. Serial No. 478,957. I

' the following is a full, clear, and exact description.

The invention relates to disk furrow-open: ers. 1 In seeding-machines it is now common practice to employ furrow-openers consist.- ing essentially of a pair of oppositely disposed disks mounted in angular relation to one another for opening a furrow, these being generally known as double disk furrow-openers. In this class ofdevices each disk is independently j ournaled in the sup port, and a desideratum' is to provide a bearing structure which is as narrow as possi v ble to leave the greatest possible clearance between the furrow-openers which are usually employed in gangs in a seeding-machine.

One object of the invention is to provide an improved double disk drill in whicha narrow bearing-structure may be adopted while affording proper bearing-surfaces for the disks, and this result is accomplished by providing the disks with spindles rotating therewith and which are mounted in the support so that they will receive lateral or axial thrust from each other. By thus mounting the disk-spindlesthey may be very narrow and yet afford proper bearing whereby the disks will be truly journaled and furthermore, the spindles maybe brought into contacting relationship, dispensing with the necessity of clearance between their inner ends. Another resultant advantage of this feature is that the disk spindles rotating in the same direction will have rolling contact and thus avoid friction incident to a non-rotating part for receiving inward thrust thereof. A still further resultant advantage of mounting the disk-spindles so their inner ends will receive thrust from each other, is that the rotation of one disk will aid in rotating the other, if the rotation of one is being unduly retarded in operating in the soil.

The invention also designs to provide an improved manner whereby the disk-spindle or trunnion may be inserted into the bearing in the support. In accordance with this object of the invention, the spindle is insertible into vthe bearing from that side at which the disk is disposed and held inthe bearing'bymeans fixed to the support on the same side thereof, the disk being connected to the spindle after the latter has been inserted in the bearing. Resultantly, the disks may be conveniently removed for sharpeningwithout removing the bearing-spindles rotating therewith, and the means for seformed to serve as a closure, for confining the lubricant in the bearing and need not be removed when the disk is removed.

The invention still further designs to improve the construction of disk furrow-openers and more particularly the devices for journaling them in their supports.

The invention consists in the several novel features hereinafter set forth and moreparcuring the spindle in its bearing may be ticularly defined by claims at the conclusion hereof. r

In the drawings: Figure 1 is a side-elevation ofa furrow-opener embodying the invention. Fig. 2-is'a section on line 22 of Fig. 1. Fig. 3 is a similar view, the disk spindles being shown in elevation. .Fig. 4

is a central longitudinal section taken through the boot between the disks. Fig. 5 is a side 'elevation of a portion of the support and bearing thereon, the spindle at one side being removed. Fig. 6 is a detail perspective of one of the plates for reducing the side-openings in the bearing. Fig. 7 is a perspective view of the cup-shaped dust guard. ig. 8 is a perspective of one of the disk-spindles.

The furrow-opener is usually connected to the frame of a seeding-machine by a dragbar 11 to which is secured a support or boot 12 in which is formed a seed-conduit 13 through which the seed is conducted into the furrow formed by the opener. A. disk 14 is disposed at each side-of the boot and these disks are journaled at an angle to each other relatively to open a'furrow, the disks being mounted so their lower portions will be in contact orclose proximity, thence Each disk is revolubly connected to the boo-t or support 12, the latter being formed with an annular wall 15 which serves as a bearing for the disk-spindle. A spindle or trunnion 16 is provided for each disk and is journaled in the bearing 15 of the support, the spindles being journaled at an angle to one another, corresponding to the angular relation of the disks and are oppositely mounted in said bearing, and the periphery 17 of each spindle 16 fits into the recess or opening in the bearing 15 and the inner face 19 of each spindle is conoidal to form a thrust-surface having a rolling contact with the other spindle, whereby the lateral thrust of one spindle will be received and opposed by the other. Each spindle is formed with a reduced portion 20 which extends through a plate 22 having an opening 23 therein which fits around said reduced portion and which confines the spindle against outward movement in its bearing, by engaging the shoulders 17 at the inner end of the reduced portion 20 of the spindle. Each plate 92 is secured to one of the sides of the support by screws Q/l. lhe outer end of each spindle is provided with a reduced terminal 25 which is square in form, or other suitable shape, to extend through a co-rre 'spondingly shaped opening in the disk, so

that the disk and spindle will rotate together. A washer 26 engages the outer face of each disk and is secured to clamp the disk on the spindle by a screw 27. A cup shaped dirt-guard 28, usually form-ed of sheet metal, is clamped between the disk and the shoulder 29 of the spindle, and com prises an inturned flange 30 which extends around the periphery of plate 22 and prevents the entry of dirt between the disk and the plate 22 and to the bearing for the spindle.

In practice the soil presses against the lower portions of the outer faces of the disks so that inward thrust or pressure will be exerted on the disk-spindles so that the latter will receive lateral thrust from each other at the contacting line or point below the spindle axes. It also occurs in practice that the seeding-machine is at times driven backwardly so that the lower portions of the disks will be pressed outwardly'and to keep these spindles properly positioned in the bearing and prevent them from becoming cramped therein, a Wall or abutment 30 is formed on the support and fits between the supported portions of the revolving spindles. Under these abnormal conditions the abutment receives lateral thrust at a point opposite the contacting point of the spindles. Thus the spindles will be at all times truly'held in the hearings in such manner that excessive friction will be avoided. I

An oil-duct 31 is formed in the .support and communicates at its lower end with the opening or chamber in which'the spindles rotate, so that lubrication may be supplied to the inclosed spindles, and the walls 0: the bearing in which they are journaled.

By employing a plate 2:2- which is secured to the support and through which the reduced spindle portion 20 extends, the side-opening in the bearing is reduced to form a well in which the lubricant will be retained by the plate. 7

As a result of the construction set forth, each disk is provided with a spindle rotating therewith and these spindles receive lateral thrust from each other which makes it possible to employ an extremely narrow spindle which will sufiice to properly sustain the disks and avoid unnecessar friction. Furthermore, the engaging surfaces of the spindles are in rolling contact with each other so that no friction will result from the lateral thrust or stresses received by the spindles. By'employing an abutment or wall between the non-contacting portions of the relatively angularly disposed spindles, the studs will at all times be truly confined in the bearing-recess or chamber despite any variation resulting from wear of the parts.

In assembling the device, the spindles are first placed into the bearing 15 from the opposite sides thereof and the plates 22 are then respectively secured to the outer sides of the hearing. The spindles will then be held in the bearing against lateral movement in either direction. The cupshaped guards 28 and disks 1d will then be placed on the reduced terminal 25 of the spindles respectively and securely clamped between washers 26 and shoulders by screws :27. When it is desired to remove one of the disks for sharpening, or to replace one, it is only necessary to remove the screw 2-7 when the disk will be free to be withdrawn laterally from the reduced terminal of a spindle. Thus, each disk may be removed without disturbing the spindles or bearing.

As a result of mounting the spindles rotatably in the bearing and securing them against outward movement by means at the outer sides of the bearing, and connecting the disk to the spindle after the latter is held in the bearing, by said means, the disks may be removed for sharpening or replacement without removing the spindles. Th6 improved cupshaped dirt-guard effectively prevents the entry of dirt to the bearing and prevents it from being clogged. The closure plate extending around a reduced portion 01"- the spindle prevents the escape of lubricant from the bearing. The con struction throughout is one which makes it possible to employ narrow elements while affording the necessary bearing-surfaces to tlli keep the disks in rotating and prope rela' lJlOIl. $55,4 1, I

The invention is not to be under 0 restricted to the details set forth, since these may be modified within the scope of the appended claims Without departing from the spirit and scope of the invention. I c

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a double disk furrow opener, the combination of a support provided with a bearing, a pair of disks'disposed at the opposite sides of said support, said disks being angled toward each other and having their edges in contact at one point to cause them to open a single furrow by moving the soil laterally and outwardly away from the outer side of both disks and a pair of spindles for the disks respectively, journaled in the bearing in angular relation to each other and having thrust surfaces which receive lateral thrust from each other independently of the bearing. 7

2. In a double disk furrow opener, the combination of a support provided with a bearing, a pair of disks disposed at the opposite sides of said support, saiddisks being angled toward each other and having their edges in contact at one point to cause them to open a single furrow by moving the soil laterally and outwardly away from the outer side of both disks, and a pair of spindles for the disks respectively, journaled in the bearing and having conoidal bearing surfaces at their inner ends receiving lateral thrust from each other independently of the bearing.

3. In a double disk furrow opener, the combination of a support provided with a bearing, a pair of disks disposed at opposite sides of said support, said disks being angled toward each other and having their edges in contact at one point to cause them to open a single furrow by moving the soil laterally and outwardly away from the outer side of both disks, and a pair of spindles for the disks respectively, journaled in the bearing in angular relation to each other and having conoidal surfaces at their inner ends engaging and receiving lateral thrust from each other independently of the bearing.

4:. In a double disk furrow opener, the combination of a support provided with a bearing, a pair of disks disposed at opposite sides of said support, said disks being angled toward each other and having their edges in contact at one point to cause them to open a single furrow by moving the soil laterally and outwardly away from the outer side of both disks, and a pair of spindles for the disks respectively, journaled in the bearing in angular relation to each other and having conoidal bearing surfaces at their inner ends in rolling contact with each other and receiving lateral thrust fromeach other independently of the bearing. 7

v5. In a double disk furrow-opener,' the combination of a support provided with a faces for receiving lateral thrust from each other, and an abutment between said inner ends. c

6. In a double disk furrow-opener, the

combination of a support provided with a I bearing, a pair of disks at the sides of the bearing respectively, a pair'of spindles for the disks respectively, journaled in angular relation to each other in said bearing, and having inner surfaces in rolling contact with one another, and an abutment between said surfaces.

7. In a double disk furrow-opener, the combination of a support provided with a bearing, a pair of disks at'the sides of the bearing respectively, a pair of spindles for the disks respectively, journaled in angular relation to each other in said bearing and having conoidal inner surfaces in rolling contact with one another at one side of their centers, and an abutment between said surfaces.

8. In a double disk furrow-opener, the combination of a support provided with a bearing, a pair of oppositely disposed disks, a pair of spindles journaled in said bearing for the disks respectively, and mounted in the bearing to receive lateral thrust from each other, and means at the outersides of the bearing for holding the spindles in the bearing.

9. In a double disk furrow-opener, the combination of a support provided with a bearing, a pair of oppositely disposed disks, a pair spindles for the disks respectively, journaled in said bearing and mounted in the bearing to receive lateral thrust from each other, said spindles having reduced portions, and plates having openings through which the reduced portions extend, secured to the outer sides of the bearing to hold the spindles in the bearing. 7

lOwIn a double disk furrow-opener, the combination of a support provided with a bearing, a pair of oppositely disposed disks, a pair of spindles journaled in the bearing to receive lateral thrust from each other, means at the outer sides of the bearing for holding the spindles in the bearing, and means for removably securing ends of the spindles. I g V 11; The combination of a support having mweo a hearing therein which is open at both; sides, spindles, said spindles being mounted in the spindles journaled in the bearing and inbearing to receive lateral thrust from each 19 sertible through said glpen iidles respectivefly, other. means at the open si es 0 tie support or a holding the spindles in the bearing respec- CLINTON DICKINSON tively and secured to the support after the Witnesses: spindles have been inserted, and disks re- GEO. J. RoELLIG, spectively secured to the outer ends of the NELLE G. JONES.

Copies of this Patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

